Rear sight for guns



- Search Room 33-258 (in? 290769006 5R April 6, 1937. A.. SHERMAN2,076,006

REAR SIGHT FOR GUNS Filed Feb. 10, 1936 v \Af/l ZZES?! E S I Y I? 33.GEONETRICAL lNSTRUlViENT3.

Patented Apr. 6, 1937 UNITED STATES Search Room PATENT OFFICE REAR SIGHTFOR GUNS Albert Sherman, Hampton, Va. Application February 10, 1936,Serial No. 63,134

8 Claims.

My invention relates to a rear sight for a gun. The most satisfactorytypes of rear sights now employed are peep-sights with micrometer-clickadjustments for windage and elevation. Such sights, however, because ofthe workmanship required to make them satisfactory at present are tooexpensive to be sold with the inexpensive class of gun. The rear sightsgenerally fitted to such cheap guns are wholly unsatisfactory in themanner of their adjusting. The object of my invention is to provide anovel design for a rear sight which possesses the desirable features ofmicrometer-click adjustments without play for windage and elevation, andof sturdy construction, yet is so simple in structure as to enable it tobe manufactured at very low cost, and thus provide the cheap gun with ahighly satisfactory rear sight.

In the accompanying figures and specification, I will describe oneembodiment of my invention. Figure 1 is a side view and Figure 2 is anend view of my invention. Referring to the figures, the body 3 of thisgun sight is substantially a composition of springs, and is providedwith a mounting portion 4. This mounting portion 4 comprises means forsuitably fastening the sight to the breech of a gun as desired. Althoughany suitable means may be used, for purposes of illustration I haveshown a number of holes 5 for fasening the sight by means of screws tothe breech of a gun. The mounting portion 4 connects with the inner arm6 of leaf spring I. The outer arm 8 of leaf spring I is provided nearits free end with some manner of boss 9 drilled and tapped to receiveadjusting screw l 0. In Figure 1, the outer arm 8 is shown partially cutaway to show the inner arm 6 connecting with the mounting portion 4. Theouter arm 8 attaches by means of the connecting portion II to the lowerarm l2 of spring l3. The upper arm l4 of spring I3 is provided near itsfree end with a boss l5 similar in construction to boss 9 and adapted tothreadably receive adjusting screw [6. Sighting member I! suitablyconnects to the free end of spring arm I4 and is provided with a meansfor sighting such as peepholes I8. In my disclosure, for purposes ofillustration I have shown two vertically disposed peepholes l8. In thisillustration the adjusting screws [0 and I6 are provided with similarlyconstructed notched heads I9 and 20 respectively. Although any suitabletype of notch may be used, for purposes of illustration, I have shownV-shaped notches. Leaf springs 2| and 22 extend from spring arms 6 andI2 respectively and are adapted to engage under initial springing in thenotches of heads 19 and 20 respectively for holding adjusting screws l0and I6 respectively in their set positions. In this illustration I havealso shown nuts 23 and 24 which may be used for further locking theadjusting screws l0 and I6 respectively in any desired positions, orwhich may be used to entirely supplant the leaf springs 2| and 22 ifconsidered desirable. The leaf springs 2| and 22 may be provided withgraduations 25 and 26 respectively. Pointers 21 and 28 may be attachedto spring arms 8 and I4 respectively for the purpose of indicating thegraduations 25 and 26 respectively.

The manner of operation of my invention is as follows: the adjustingscrew [0 abuts against the surface of spring arm 6 and maintains thespring arms 6 and 8 apart against the action of spring 1. Thus it isevident that manual rotation of adjusting screw l0 provides movement ofthe sighting member I! laterally (in Figure 2) with respect to mountingportion 4. On manually rotating adjusting screw ID; the leaf spring 2|is adapted to deflect and engage successive notches in the head IQ ofadjusting screw 10 as the adjusting screw is rotated. The leaf spring 2!thus clicks when adjustment is being made and holds the adjusting screwID in any position to which it is set that corresponds with a notch inthe head I9. Similarly, the adjusting screw l6 abuts against the surfaceof spring arm l2 and maintains the spring arms [2 and I4 apart againstthe action of spring l3. Thus it is evident that manual rotation ofadjusting screw l6 provides movement of the sighting member I!vertically with respect to mounting portion 4. The leaf spring 22 actsin a similar manner to leaf spring 2! to hold the adjusting screw It inany position to which it is set that corresponds with a notch in thehead 20. Nuts 23 and 24 may be screwed manually against bosses 9 and 15respectively to maintain locking of the adjusting screws l0 and I6respectively in any positions desired. The transverse and verticalsettings of the sight are indicated by the positions of the notchedheads 19 and 20 respectively, and the positions of the pointers 21 and28 respectively relative to the graduations 25 and 26 respectively. Inthe preceding description, the sighting member H was provided with twopeepholes l8 disposed one vertically above the other. The lower peepholeis for sighting at objects within a certain range and the upper peepholeis for sighting at objects within a succeedingly greater range. Thisarrangement of peepholes reduces the movement apart of the spring armsl2 and I4 relative to each other which is required to obtain sightingover a large range. It is evident that as many peepholes as may beconsidered desirable and of any desired character may be provided.

From the figures and description, it is obvious 5 that the adjustmentprovided, the windage or the elevation is adapted to be very sensitiveand accurate. It is also evident that the entire body, including themounting portion 4, the springs 1 and I3, the bosses 9 and I5, the leafsprings 2| 10 and 22, the pointers 2'! and 28, and the sighting memberI! can be stamped and formed from a single piece of metal if so desired,without the slightest necessity for close fits for the total eliminationof play, such as required for the usual types of sights; all of whichbeing adaptable to very economical manufacture. While I have describedbut One embodiment of my invention, it will be obvious to anyone skilledin the art that it is not so limited but is susceptible to variouschanges and modifications Without departing from the spirit thereof.

I claim:

I 1. In a sight of the class described, a sightin element, twoU-springs, the outer end of one arm of one of said springs beingconnected to the outer end of an arm of the other spring, each of saidU-springs being disposed to allow movement of the aperture of the sightin one of two mutually perpendicular directions respectively, ad-.

justable means for separating under stress the arms of said springs forproviding said movement of the aperture of the sight, the free end ofone spring being connected to the gun, the free end of the other springcarrying the sighting element.

2. A device of the class described comprising a supporting element formounting the device on a gun, a sighting plate provided with a pluralityof apertures, two U-springs attached together by one arm or each spring,the unattached arm of one of said springs being connected to thesupporting element, the unattached arm of the other U-spring beingconnected to and carrying the sighting plate, each U-spring beingdisposed to allow movement of the sighting plate in one of two mutuallyperpendicular directions respectively.

3. A device as described in claim 2 and further characterized by havingadjustable means for separating the arms of said u-springs under 60stress for controlling the aforesaid movement of said sighting plate.

4. A sight of the class described characterized by having two U-springs,the outer end of one arm of one of said springs being connected to theouter end of an arm of the other spring, and

disposed to allow windage and distance adjustment of the sight, meansfor separating the arms of the respective windage and distanceU'-springs under stress for controlling the adjustments of the sight,and a sighting element mounted upon the free end of one arm of one ofsaid U-springs.

5.In a device of the class described, a supporting element for mountingsaid device on a gun, a sighting plate having a plurality of apertures,means for connecting said sighting plate to said supporting elementcomprising two U- springs, an end of one spring being connected to anend of the other, each of said springs being adapted to allow motion ofsaid sighting plate relative to said supporting element in one of twomutually perpendicular directions respectively, a threaded recess in onearm of each of said U- springs, adjusting screws adapted to thread intothe respective recessed arms of the U-springs and to abut against theunrecessed arms for spreading the arms of said U-springs apart in anadjusting action.

6. In a device of the class described having a sighting element, tworesilient elements, each of said resilient elements having two endsadapted to move in only one direction relative to each other, one ofsaid resilient elements being connected at one end to and carrying saidsighting element and being connected at its other end to an end of theother of said resilient elements, each of said resilient elements beingadapted to allow movement of said sighting element in one of twomutually perpendicular directions respectively.

'7. In a device of the class described having a sighting element, tworesilient elements, each of said resilient elements having two endsadapted to move in only one direction relative to each other, one ofsaid resilient elements being connected at one end to and carrying saidsighting element and being connected at its other end to an end of theother of said resilient elements, each of said resilient elements beingadapted to deflect in one: of tWo mutually perpendicular directionsrespectively, and means for independently adjusting the deflections ofsaid resilient elements.

8. In a device of the class described, a supporting element for mountingsaid device on a gun, a sighting plate having a plurality of apertures,means connecting said sighting plate to said supporting elementcomprising two U-springs connected in series, each of said springs beingadapted to allow motion of said sighting plate relative to saidsupporting element in one of two mutually perpendicular directionsrespectively, a threaded recess in one arm of each of said U- springs,adjusting screws adapted to thread into said recessed arms and to abutagainst the unrecessed arms for spreading the arms of said U- springsapart, said screws being provided with notches, one arm of each of saidU-springs being extended to form cantilever springs adapted to coactwith the respective notched screws for holding said screws in their setpositions.

ALBERT SHERMAN.

